get_statistics_report

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already indicate read-only, open-world, idempotent, and non-destructive behavior. The description adds meaningful extra behavior: it performs upfront validation of the date span before fetching. This goes beyond the annotations and helps set expectations about input validation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single efficient sentence that front-loads the core action and resource, then adds the key validation behavior. Every word contributes meaning, with no fluff or repetition.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema and rich annotations present, the description does not need to explain return values. However, the report parameter remains underspecified, and date formats are not mentioned. The tool is simple, but the lack of parameter semantics leaves the description only partially complete for reliable invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate for missing parameter details. It mentions 'report' and the date span concept, but it does not define valid report values, expected date formats, or any constraints on begin_date/end_date. An agent would still struggle to construct a correctly typed call.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb (获取/get), a clear resource (公众号统计数据/Official Account statistics data), and the key qualifier 'by report'. It is easily distinguished from all sibling tools, none of which explicitly target statistics retrieval.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The scope is clear: use this tool to retrieve statistics data for a given report type and date range. It does not explicitly mention when not to use it or list alternatives, but no sibling tool appears to serve the same statistics purpose, so the guidance is sufficient for selection.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.